package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * Author: Zheng
 * Date:   2024/2/23  16:15
 * Package：com.sky.service.impl
 * Description：用户业务逻辑处理
 * Version：1.0
 */
@Service
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    /**
     * @param userLoginDTO
     * @description： 微信用户登录
     * @date：2024/2/23 16:26
     * @return：
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //远程调用微信接口获取openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = (String) jsonObject.get("openid");

        //如果openid为空，抛出异常
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.USER_NOT_LOGIN);
        }

        //根据openid查询用户数据
        User user = userMapper.getByOpenId(openid);
        if (user != null) {
            //如果用户数据不为空，直接返回
            return user;
        }
        //反之，注册新用户，将openid插入到user表
        user = new User();
        user.setOpenid(openid);
        user.setCreateTime(LocalDateTime.now());
        userMapper.insert(user);
        //返回用户对象
        return user;
    }
}
